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Diffstat (limited to 'fs/gfs2/incore.h')
| -rw-r--r-- | fs/gfs2/incore.h | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h new file mode 100644 index 000000000..a8c95c529 --- /dev/null +++ b/fs/gfs2/incore.h @@ -0,0 +1,874 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. + * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. + */ + +#ifndef __INCORE_DOT_H__ +#define __INCORE_DOT_H__ + +#include <linux/fs.h> +#include <linux/kobject.h> +#include <linux/workqueue.h> +#include <linux/dlm.h> +#include <linux/buffer_head.h> +#include <linux/rcupdate.h> +#include <linux/rculist_bl.h> +#include <linux/completion.h> +#include <linux/rbtree.h> +#include <linux/ktime.h> +#include <linux/percpu.h> +#include <linux/lockref.h> +#include <linux/rhashtable.h> +#include <linux/mutex.h> + +#define DIO_WAIT 0x00000010 +#define DIO_METADATA 0x00000020 + +struct gfs2_log_operations; +struct gfs2_bufdata; +struct gfs2_holder; +struct gfs2_glock; +struct gfs2_quota_data; +struct gfs2_trans; +struct gfs2_jdesc; +struct gfs2_sbd; +struct lm_lockops; + +typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); + +struct gfs2_log_header_host { + u64 lh_sequence; /* Sequence number of this transaction */ + u32 lh_flags; /* GFS2_LOG_HEAD_... */ + u32 lh_tail; /* Block number of log tail */ + u32 lh_blkno; + + s64 lh_local_total; + s64 lh_local_free; + s64 lh_local_dinodes; +}; + +/* + * Structure of operations that are associated with each + * type of element in the log. + */ + +struct gfs2_log_operations { + void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); + void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr); + void (*lo_before_scan) (struct gfs2_jdesc *jd, + struct gfs2_log_header_host *head, int pass); + int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start, + struct gfs2_log_descriptor *ld, __be64 *ptr, + int pass); + void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass); + const char *lo_name; +}; + +#define GBF_FULL 1 + +/** + * Clone bitmaps (bi_clone): + * + * - When a block is freed, we remember the previous state of the block in the + * clone bitmap, and only mark the block as free in the real bitmap. + * + * - When looking for a block to allocate, we check for a free block in the + * clone bitmap, and if no clone bitmap exists, in the real bitmap. + * + * - For allocating a block, we mark it as allocated in the real bitmap, and if + * a clone bitmap exists, also in the clone bitmap. + * + * - At the end of a log_flush, we copy the real bitmap into the clone bitmap + * to make the clone bitmap reflect the current allocation state. + * (Alternatively, we could remove the clone bitmap.) + * + * The clone bitmaps are in-core only, and is never written to disk. + * + * These steps ensure that blocks which have been freed in a transaction cannot + * be reallocated in that same transaction. + */ +struct gfs2_bitmap { + struct buffer_head *bi_bh; + char *bi_clone; + unsigned long bi_flags; + u32 bi_offset; + u32 bi_start; + u32 bi_bytes; + u32 bi_blocks; +}; + +struct gfs2_rgrpd { + struct rb_node rd_node; /* Link with superblock */ + struct gfs2_glock *rd_gl; /* Glock for this rgrp */ + u64 rd_addr; /* grp block disk address */ + u64 rd_data0; /* first data location */ + u32 rd_length; /* length of rgrp header in fs blocks */ + u32 rd_data; /* num of data blocks in rgrp */ + u32 rd_bitbytes; /* number of bytes in data bitmaps */ + u32 rd_free; + u32 rd_requested; /* number of blocks in rd_rstree */ + u32 rd_reserved; /* number of reserved blocks */ + u32 rd_free_clone; + u32 rd_dinodes; + u64 rd_igeneration; + struct gfs2_bitmap *rd_bits; + struct gfs2_sbd *rd_sbd; + struct gfs2_rgrp_lvb *rd_rgl; + u32 rd_last_alloc; + u32 rd_flags; + u32 rd_extfail_pt; /* extent failure point */ +#define GFS2_RDF_CHECK 0x10000000 /* check for unlinked inodes */ +#define GFS2_RDF_ERROR 0x40000000 /* error in rg */ +#define GFS2_RDF_PREFERRED 0x80000000 /* This rgrp is preferred */ +#define GFS2_RDF_MASK 0xf0000000 /* mask for internal flags */ + spinlock_t rd_rsspin; /* protects reservation related vars */ + struct mutex rd_mutex; + struct rb_root rd_rstree; /* multi-block reservation tree */ +}; + +enum gfs2_state_bits { + BH_Pinned = BH_PrivateStart, + BH_Escaped = BH_PrivateStart + 1, +}; + +BUFFER_FNS(Pinned, pinned) +TAS_BUFFER_FNS(Pinned, pinned) +BUFFER_FNS(Escaped, escaped) +TAS_BUFFER_FNS(Escaped, escaped) + +struct gfs2_bufdata { + struct buffer_head *bd_bh; + struct gfs2_glock *bd_gl; + u64 bd_blkno; + + struct list_head bd_list; + + struct gfs2_trans *bd_tr; + struct list_head bd_ail_st_list; + struct list_head bd_ail_gl_list; +}; + +/* + * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a + * prefix of lock_dlm_ gets awkward. + */ + +#define GDLM_STRNAME_BYTES 25 +#define GDLM_LVB_SIZE 32 + +/* + * ls_recover_flags: + * + * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been + * held by failed nodes whose journals need recovery. Those locks should + * only be used for journal recovery until the journal recovery is done. + * This is set by the dlm recover_prep callback and cleared by the + * gfs2_control thread when journal recovery is complete. To avoid + * races between recover_prep setting and gfs2_control clearing, recover_spin + * is held while changing this bit and reading/writing recover_block + * and recover_start. + * + * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used. + * + * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing + * recovery of all journals before allowing other nodes to mount the fs. + * This is cleared when FIRST_MOUNT_DONE is set. + * + * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished + * recovery of all journals, and now allows other nodes to mount the fs. + * + * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared + * BLOCK_LOCKS for the first time. The gfs2_control thread should now + * control clearing BLOCK_LOCKS for further recoveries. + * + * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq. + * + * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep() + * and recover_done(), i.e. set while recover_block == recover_start. + */ + +enum { + DFL_BLOCK_LOCKS = 0, + DFL_NO_DLM_OPS = 1, + DFL_FIRST_MOUNT = 2, + DFL_FIRST_MOUNT_DONE = 3, + DFL_MOUNT_DONE = 4, + DFL_UNMOUNT = 5, + DFL_DLM_RECOVERY = 6, +}; + +/* + * We are using struct lm_lockname as an rhashtable key. Avoid holes within + * the struct; padding at the end is fine. + */ +struct lm_lockname { + u64 ln_number; + struct gfs2_sbd *ln_sbd; + unsigned int ln_type; +}; + +#define lm_name_equal(name1, name2) \ + (((name1)->ln_number == (name2)->ln_number) && \ + ((name1)->ln_type == (name2)->ln_type) && \ + ((name1)->ln_sbd == (name2)->ln_sbd)) + + +struct gfs2_glock_operations { + int (*go_sync) (struct gfs2_glock *gl); + int (*go_xmote_bh)(struct gfs2_glock *gl); + void (*go_inval) (struct gfs2_glock *gl, int flags); + int (*go_demote_ok) (const struct gfs2_glock *gl); + int (*go_instantiate) (struct gfs2_glock *gl); + int (*go_held)(struct gfs2_holder *gh); + void (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl, + const char *fs_id_buf); + void (*go_callback)(struct gfs2_glock *gl, bool remote); + void (*go_free)(struct gfs2_glock *gl); + const int go_subclass; + const int go_type; + const unsigned long go_flags; +#define GLOF_ASPACE 1 /* address space attached */ +#define GLOF_LVB 2 /* Lock Value Block attached */ +#define GLOF_LRU 4 /* LRU managed */ +#define GLOF_NONDISK 8 /* not I/O related */ +}; + +enum { + GFS2_LKS_SRTT = 0, /* Non blocking smoothed round trip time */ + GFS2_LKS_SRTTVAR = 1, /* Non blocking smoothed variance */ + GFS2_LKS_SRTTB = 2, /* Blocking smoothed round trip time */ + GFS2_LKS_SRTTVARB = 3, /* Blocking smoothed variance */ + GFS2_LKS_SIRT = 4, /* Smoothed Inter-request time */ + GFS2_LKS_SIRTVAR = 5, /* Smoothed Inter-request variance */ + GFS2_LKS_DCOUNT = 6, /* Count of dlm requests */ + GFS2_LKS_QCOUNT = 7, /* Count of gfs2_holder queues */ + GFS2_NR_LKSTATS +}; + +struct gfs2_lkstats { + u64 stats[GFS2_NR_LKSTATS]; +}; + +enum { + /* States */ + HIF_HOLDER = 6, /* Set for gh that "holds" the glock */ + HIF_WAIT = 10, +}; + +struct gfs2_holder { + struct list_head gh_list; + + struct gfs2_glock *gh_gl; + struct pid *gh_owner_pid; + u16 gh_flags; + u16 gh_state; + + int gh_error; + unsigned long gh_iflags; /* HIF_... */ + unsigned long gh_ip; +}; + +/* Number of quota types we support */ +#define GFS2_MAXQUOTAS 2 + +struct gfs2_qadata { /* quota allocation data */ + /* Quota stuff */ + struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS]; + struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS]; + unsigned int qa_qd_num; + int qa_ref; +}; + +/* Resource group multi-block reservation, in order of appearance: + + Step 1. Function prepares to write, allocates a mb, sets the size hint. + Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info + Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use + Step 4. Bits are assigned from the rgrp based on either the reservation + or wherever it can. +*/ + +struct gfs2_blkreserv { + struct rb_node rs_node; /* node within rd_rstree */ + struct gfs2_rgrpd *rs_rgd; + u64 rs_start; + u32 rs_requested; + u32 rs_reserved; /* number of reserved blocks */ +}; + +/* + * Allocation parameters + * @target: The number of blocks we'd ideally like to allocate + * @aflags: The flags (e.g. Orlov flag) + * + * The intent is to gradually expand this structure over time in + * order to give more information, e.g. alignment, min extent size + * to the allocation code. + */ +struct gfs2_alloc_parms { + u64 target; + u32 min_target; + u32 aflags; + u64 allowed; +}; + +enum { + GLF_LOCK = 1, + GLF_INSTANTIATE_NEEDED = 2, /* needs instantiate */ + GLF_DEMOTE = 3, + GLF_PENDING_DEMOTE = 4, + GLF_DEMOTE_IN_PROGRESS = 5, + GLF_DIRTY = 6, + GLF_LFLUSH = 7, + GLF_INVALIDATE_IN_PROGRESS = 8, + GLF_REPLY_PENDING = 9, + GLF_INITIAL = 10, + GLF_FROZEN = 11, + GLF_INSTANTIATE_IN_PROG = 12, /* instantiate happening now */ + GLF_LRU = 13, + GLF_OBJECT = 14, /* Used only for tracing */ + GLF_BLOCKING = 15, + GLF_FREEING = 16, /* Wait for glock to be freed */ + GLF_TRY_TO_EVICT = 17, /* iopen glocks only */ + GLF_VERIFY_EVICT = 18, /* iopen glocks only */ +}; + +struct gfs2_glock { + unsigned long gl_flags; /* GLF_... */ + struct lm_lockname gl_name; + + struct lockref gl_lockref; + + /* State fields protected by gl_lockref.lock */ + unsigned int gl_state:2, /* Current state */ + gl_target:2, /* Target state */ + gl_demote_state:2, /* State requested by remote node */ + gl_req:2, /* State in last dlm request */ + gl_reply:8; /* Last reply from the dlm */ + + unsigned long gl_demote_time; /* time of first demote request */ + long gl_hold_time; + struct list_head gl_holders; + + const struct gfs2_glock_operations *gl_ops; + ktime_t gl_dstamp; + struct gfs2_lkstats gl_stats; + struct dlm_lksb gl_lksb; + unsigned long gl_tchange; + void *gl_object; + + struct list_head gl_lru; + struct list_head gl_ail_list; + atomic_t gl_ail_count; + atomic_t gl_revokes; + struct delayed_work gl_work; + /* For iopen glocks only */ + struct { + struct delayed_work gl_delete; + u64 gl_no_formal_ino; + }; + struct rcu_head gl_rcu; + struct rhash_head gl_node; +}; + +enum { + GIF_QD_LOCKED = 1, + GIF_ALLOC_FAILED = 2, + GIF_SW_PAGED = 3, + GIF_FREE_VFS_INODE = 5, + GIF_GLOP_PENDING = 6, + GIF_DEFERRED_DELETE = 7, +}; + +struct gfs2_inode { + struct inode i_inode; + u64 i_no_addr; + u64 i_no_formal_ino; + u64 i_generation; + u64 i_eattr; + unsigned long i_flags; /* GIF_... */ + struct gfs2_glock *i_gl; + struct gfs2_holder i_iopen_gh; + struct gfs2_qadata *i_qadata; /* quota allocation data */ + struct gfs2_holder i_rgd_gh; + struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */ + u64 i_goal; /* goal block for allocations */ + atomic_t i_sizehint; /* hint of the write size */ + struct rw_semaphore i_rw_mutex; + struct list_head i_ordered; + __be64 *i_hash_cache; + u32 i_entries; + u32 i_diskflags; + u8 i_height; + u8 i_depth; + u16 i_rahead; +}; + +/* + * Since i_inode is the first element of struct gfs2_inode, + * this is effectively a cast. + */ +static inline struct gfs2_inode *GFS2_I(struct inode *inode) +{ + return container_of(inode, struct gfs2_inode, i_inode); +} + +static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode) +{ + return inode->i_sb->s_fs_info; +} + +struct gfs2_file { + struct mutex f_fl_mutex; + struct gfs2_holder f_fl_gh; +}; + +struct gfs2_revoke_replay { + struct list_head rr_list; + u64 rr_blkno; + unsigned int rr_where; +}; + +enum { + QDF_CHANGE = 1, + QDF_LOCKED = 2, + QDF_REFRESH = 3, + QDF_QMSG_QUIET = 4, +}; + +struct gfs2_quota_data { + struct hlist_bl_node qd_hlist; + struct list_head qd_list; + struct kqid qd_id; + struct gfs2_sbd *qd_sbd; + struct lockref qd_lockref; + struct list_head qd_lru; + unsigned qd_hash; + + unsigned long qd_flags; /* QDF_... */ + + s64 qd_change; + s64 qd_change_sync; + + unsigned int qd_slot; + unsigned int qd_slot_ref; + + struct buffer_head *qd_bh; + struct gfs2_quota_change *qd_bh_qc; + unsigned int qd_bh_count; + + struct gfs2_glock *qd_gl; + struct gfs2_quota_lvb qd_qb; + + u64 qd_sync_gen; + unsigned long qd_last_warn; + struct rcu_head qd_rcu; +}; + +enum { + TR_TOUCHED = 1, + TR_ATTACHED = 2, + TR_ONSTACK = 3, +}; + +struct gfs2_trans { + unsigned long tr_ip; + + unsigned int tr_blocks; + unsigned int tr_revokes; + unsigned int tr_reserved; + unsigned long tr_flags; + + unsigned int tr_num_buf_new; + unsigned int tr_num_databuf_new; + unsigned int tr_num_buf_rm; + unsigned int tr_num_databuf_rm; + unsigned int tr_num_revoke; + + struct list_head tr_list; + struct list_head tr_databuf; + struct list_head tr_buf; + + unsigned int tr_first; + struct list_head tr_ail1_list; + struct list_head tr_ail2_list; +}; + +struct gfs2_journal_extent { + struct list_head list; + + unsigned int lblock; /* First logical block */ + u64 dblock; /* First disk block */ + u64 blocks; +}; + +struct gfs2_jdesc { + struct list_head jd_list; + struct list_head extent_list; + unsigned int nr_extents; + struct work_struct jd_work; + struct inode *jd_inode; + struct bio *jd_log_bio; + unsigned long jd_flags; +#define JDF_RECOVERY 1 + unsigned int jd_jid; + u32 jd_blocks; + int jd_recover_error; + /* Replay stuff */ + + unsigned int jd_found_blocks; + unsigned int jd_found_revokes; + unsigned int jd_replayed_blocks; + + struct list_head jd_revoke_list; + unsigned int jd_replay_tail; + + u64 jd_no_addr; +}; + +struct gfs2_statfs_change_host { + s64 sc_total; + s64 sc_free; + s64 sc_dinodes; +}; + +#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF +#define GFS2_QUOTA_OFF 0 +#define GFS2_QUOTA_ACCOUNT 1 +#define GFS2_QUOTA_ON 2 +#define GFS2_QUOTA_QUIET 3 /* on but not complaining */ + +#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED +#define GFS2_DATA_WRITEBACK 1 +#define GFS2_DATA_ORDERED 2 + +#define GFS2_ERRORS_DEFAULT GFS2_ERRORS_WITHDRAW +#define GFS2_ERRORS_WITHDRAW 0 +#define GFS2_ERRORS_CONTINUE 1 /* place holder for future feature */ +#define GFS2_ERRORS_RO 2 /* place holder for future feature */ +#define GFS2_ERRORS_PANIC 3 + +struct gfs2_args { + char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */ + char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */ + char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */ + unsigned int ar_spectator:1; /* Don't get a journal */ + unsigned int ar_localflocks:1; /* Let the VFS do flock|fcntl */ + unsigned int ar_debug:1; /* Oops on errors */ + unsigned int ar_posix_acl:1; /* Enable posix acls */ + unsigned int ar_quota:2; /* off/account/on */ + unsigned int ar_suiddir:1; /* suiddir support */ + unsigned int ar_data:2; /* ordered/writeback */ + unsigned int ar_meta:1; /* mount metafs */ + unsigned int ar_discard:1; /* discard requests */ + unsigned int ar_errors:2; /* errors=withdraw | panic */ + unsigned int ar_nobarrier:1; /* do not send barriers */ + unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */ + unsigned int ar_got_rgrplvb:1; /* Was the rgrplvb opt given? */ + unsigned int ar_loccookie:1; /* use location based readdir + cookies */ + s32 ar_commit; /* Commit interval */ + s32 ar_statfs_quantum; /* The fast statfs interval */ + s32 ar_quota_quantum; /* The quota interval */ + s32 ar_statfs_percent; /* The % change to force sync */ +}; + +struct gfs2_tune { + spinlock_t gt_spin; + + unsigned int gt_logd_secs; + + unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ + unsigned int gt_quota_scale_num; /* Numerator */ + unsigned int gt_quota_scale_den; /* Denominator */ + unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ + unsigned int gt_new_files_jdata; + unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ + unsigned int gt_complain_secs; + unsigned int gt_statfs_quantum; + unsigned int gt_statfs_slow; +}; + +enum { + SDF_JOURNAL_CHECKED = 0, + SDF_JOURNAL_LIVE = 1, + SDF_WITHDRAWN = 2, + SDF_NOBARRIERS = 3, + SDF_NORECOVERY = 4, + SDF_DEMOTE = 5, + SDF_NOJOURNALID = 6, + SDF_RORECOVERY = 7, /* read only recovery */ + SDF_SKIP_DLM_UNLOCK = 8, + SDF_FORCE_AIL_FLUSH = 9, + SDF_FREEZE_INITIATOR = 10, + SDF_WITHDRAWING = 11, /* Will withdraw eventually */ + SDF_WITHDRAW_IN_PROG = 12, /* Withdraw is in progress */ + SDF_REMOTE_WITHDRAW = 13, /* Performing remote recovery */ + SDF_WITHDRAW_RECOVERY = 14, /* Wait for journal recovery when we are + withdrawing */ + SDF_KILL = 15, + SDF_EVICTING = 16, + SDF_FROZEN = 17, +}; + +#define GFS2_FSNAME_LEN 256 + +struct gfs2_inum_host { + u64 no_formal_ino; + u64 no_addr; +}; + +struct gfs2_sb_host { + u32 sb_magic; + u32 sb_type; + + u32 sb_fs_format; + u32 sb_multihost_format; + u32 sb_bsize; + u32 sb_bsize_shift; + + struct gfs2_inum_host sb_master_dir; + struct gfs2_inum_host sb_root_dir; + + char sb_lockproto[GFS2_LOCKNAME_LEN]; + char sb_locktable[GFS2_LOCKNAME_LEN]; +}; + +/* + * lm_mount() return values + * + * ls_jid - the journal ID this node should use + * ls_first - this node is the first to mount the file system + * ls_lockspace - lock module's context for this file system + * ls_ops - lock module's functions + */ + +struct lm_lockstruct { + int ls_jid; + unsigned int ls_first; + const struct lm_lockops *ls_ops; + dlm_lockspace_t *ls_dlm; + + int ls_recover_jid_done; /* These two are deprecated, */ + int ls_recover_jid_status; /* used previously by gfs_controld */ + + struct dlm_lksb ls_mounted_lksb; /* mounted_lock */ + struct dlm_lksb ls_control_lksb; /* control_lock */ + char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */ + struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */ + char *ls_lvb_bits; + + spinlock_t ls_recover_spin; /* protects following fields */ + unsigned long ls_recover_flags; /* DFL_ */ + uint32_t ls_recover_mount; /* gen in first recover_done cb */ + uint32_t ls_recover_start; /* gen in last recover_done cb */ + uint32_t ls_recover_block; /* copy recover_start in last recover_prep */ + uint32_t ls_recover_size; /* size of recover_submit, recover_result */ + uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */ + uint32_t *ls_recover_result; /* result of last jid recovery */ +}; + +struct gfs2_pcpu_lkstats { + /* One struct for each glock type */ + struct gfs2_lkstats lkstats[10]; +}; + +/* List of local (per node) statfs inodes */ +struct local_statfs_inode { + struct list_head si_list; + struct inode *si_sc_inode; + unsigned int si_jid; /* journal id this statfs inode corresponds to */ +}; + +struct gfs2_sbd { + struct super_block *sd_vfs; + struct gfs2_pcpu_lkstats __percpu *sd_lkstats; + struct kobject sd_kobj; + struct completion sd_kobj_unregister; + unsigned long sd_flags; /* SDF_... */ + struct gfs2_sb_host sd_sb; + + /* Constants computed on mount */ + + u32 sd_fsb2bb; + u32 sd_fsb2bb_shift; + u32 sd_diptrs; /* Number of pointers in a dinode */ + u32 sd_inptrs; /* Number of pointers in a indirect block */ + u32 sd_ldptrs; /* Number of pointers in a log descriptor block */ + u32 sd_jbsize; /* Size of a journaled data block */ + u32 sd_hash_bsize; /* sizeof(exhash block) */ + u32 sd_hash_bsize_shift; + u32 sd_hash_ptrs; /* Number of pointers in a hash block */ + u32 sd_qc_per_block; + u32 sd_blocks_per_bitmap; + u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ + u32 sd_max_height; /* Max height of a file's metadata tree */ + u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; + u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */ + + struct gfs2_args sd_args; /* Mount arguments */ + struct gfs2_tune sd_tune; /* Filesystem tuning structure */ + + /* Lock Stuff */ + + struct lm_lockstruct sd_lockstruct; + struct gfs2_holder sd_live_gh; + struct gfs2_glock *sd_rename_gl; + struct gfs2_glock *sd_freeze_gl; + struct work_struct sd_freeze_work; + wait_queue_head_t sd_kill_wait; + wait_queue_head_t sd_async_glock_wait; + atomic_t sd_glock_disposal; + struct completion sd_locking_init; + struct completion sd_wdack; + struct delayed_work sd_control_work; + + /* Inode Stuff */ + + struct dentry *sd_master_dir; + struct dentry *sd_root_dir; + + struct inode *sd_jindex; + struct inode *sd_statfs_inode; + struct inode *sd_sc_inode; + struct list_head sd_sc_inodes_list; + struct inode *sd_qc_inode; + struct inode *sd_rindex; + struct inode *sd_quota_inode; + + /* StatFS stuff */ + + spinlock_t sd_statfs_spin; + struct gfs2_statfs_change_host sd_statfs_master; + struct gfs2_statfs_change_host sd_statfs_local; + int sd_statfs_force_sync; + + /* Resource group stuff */ + + int sd_rindex_uptodate; + spinlock_t sd_rindex_spin; + struct rb_root sd_rindex_tree; + unsigned int sd_rgrps; + unsigned int sd_max_rg_data; + + /* Journal index stuff */ + + struct list_head sd_jindex_list; + spinlock_t sd_jindex_spin; + struct mutex sd_jindex_mutex; + unsigned int sd_journals; + + struct gfs2_jdesc *sd_jdesc; + struct gfs2_holder sd_journal_gh; + struct gfs2_holder sd_jinode_gh; + struct gfs2_glock *sd_jinode_gl; + + struct gfs2_holder sd_sc_gh; + struct buffer_head *sd_sc_bh; + struct gfs2_holder sd_qc_gh; + + struct completion sd_journal_ready; + + /* Workqueue stuff */ + + struct workqueue_struct *sd_delete_wq; + + /* Daemon stuff */ + + struct task_struct *sd_logd_process; + struct task_struct *sd_quotad_process; + + /* Quota stuff */ + + struct list_head sd_quota_list; + atomic_t sd_quota_count; + struct mutex sd_quota_mutex; + struct mutex sd_quota_sync_mutex; + wait_queue_head_t sd_quota_wait; + + unsigned int sd_quota_slots; + unsigned long *sd_quota_bitmap; + spinlock_t sd_bitmap_lock; + + u64 sd_quota_sync_gen; + + /* Log stuff */ + + struct address_space sd_aspace; + + spinlock_t sd_log_lock; + + struct gfs2_trans *sd_log_tr; + unsigned int sd_log_blks_reserved; + + atomic_t sd_log_pinned; + unsigned int sd_log_num_revoke; + + struct list_head sd_log_revokes; + struct list_head sd_log_ordered; + spinlock_t sd_ordered_lock; + + atomic_t sd_log_thresh1; + atomic_t sd_log_thresh2; + atomic_t sd_log_blks_free; + atomic_t sd_log_blks_needed; + atomic_t sd_log_revokes_available; + wait_queue_head_t sd_log_waitq; + wait_queue_head_t sd_logd_waitq; + + u64 sd_log_sequence; + int sd_log_idle; + + struct rw_semaphore sd_log_flush_lock; + atomic_t sd_log_in_flight; + wait_queue_head_t sd_log_flush_wait; + int sd_log_error; /* First log error */ + wait_queue_head_t sd_withdraw_wait; + + unsigned int sd_log_tail; + unsigned int sd_log_flush_tail; + unsigned int sd_log_head; + unsigned int sd_log_flush_head; + + spinlock_t sd_ail_lock; + struct list_head sd_ail1_list; + struct list_head sd_ail2_list; + + /* For quiescing the filesystem */ + struct gfs2_holder sd_freeze_gh; + struct mutex sd_freeze_mutex; + + char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2]; + char sd_table_name[GFS2_FSNAME_LEN]; + char sd_proto_name[GFS2_FSNAME_LEN]; + + /* Debugging crud */ + + unsigned long sd_last_warning; + struct dentry *debugfs_dir; /* debugfs directory */ + unsigned long sd_glock_dqs_held; +}; + +static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which) +{ + gl->gl_stats.stats[which]++; +} + +static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which) +{ + const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; + preempt_disable(); + this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++; + preempt_enable(); +} + +extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl); + +static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip) +{ + return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); +} + +#endif /* __INCORE_DOT_H__ */ + |